Power plant flue gas waste heat direct evaporating desalination system with flue gas reheating function

Abstract

The invention discloses a power plant flue gas waste heat direct evaporating desalination system with a flue gas reheating function. A boiler is connected with a flue gas waste heat seawater evaporator 2, an electric precipitator 3, an induced draft fan 4, a desulfurizing tower 5, a shell pass of a first flue gas heater 6, a shell pass of a second flue gas heater 7, a booster fan 8 and a chimney 9 through pipelines; the flue gas waste heat seawater evaporator 2 is sequentially connected with the shell pass of the first flue gas heater 6, a shell pass of a first seawater preheater 10, a product water tank 15 and a vacuum pump 13 through pipelines; the flue gas waste heat seawater evaporator 2 is sequentially connected with the shell pass of the second flue gas heater 7, a shell pass of a second seawater preheater 11 and a concentrated water pump 14 through pipelines; and a raw water pump 12 is sequentially connected with the shell pass of the first seawater preheater 10, the shell pass of the second seawater preheater 11 and the flue gas waste heat seawater evaporator 2 through pipelines. According to the system, sea water desalination is realized so as to obtain fresh water while achieving the emission reducing effect.

Description

Technical field [0001] The invention belongs to the technical field of seawater desalination and flue gas waste heat utilization, and relates to a power plant flue gas waste heat direct evaporation type seawater desalination system with flue gas reheating function. Background technique [0002] Water shortage is a major issue involving human survival and social development worldwide. With the rapid development of my country's economy and society and the continuous progress of urbanization, water shortage has become an important factor restricting the sustainable development of my country's economy and society. As an effective means to increase the amount of water resources from the source, seawater desalination is receiving increasing attention and development. Through years of development, seawater desalination technology has been greatly improved. However, the current mature seawater desalination process still has some problems. On the one hand, a large amount of energy must b...

AI Technical Summary

Problems solved by technology

Since the corrosive gas contained in the flue gas will condense and precipitate when the temperature is lowered, causing dew point corrosion on the heat exchange surface, so it is more difficult to recover the waste heat of the lower temperature flue gas

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